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  <title>Random number</title>
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  <div id="layout-content"><div id="function.gmp-random-range" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">gmp_random_range</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.6.3, PHP 7)</p><p class="refpurpose"><span class="refname">gmp_random_range</span> &mdash; <span class="dc-title">Random number</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.gmp-random-range-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>gmp_random_range</strong></span>
    ( <span class="methodparam"><span class="type"><a href="class.gmp.html" class="type GMP">GMP</a></span> <code class="parameter">$min</code></span>
   , <span class="methodparam"><span class="type"><a href="class.gmp.html" class="type GMP">GMP</a></span> <code class="parameter">$max</code></span>
   ) : <span class="type"><a href="class.gmp.html" class="type GMP">GMP</a></span></div>

  <p class="para rdfs-comment">
   Generate a random number. The number will be between
   <code class="parameter">min</code> and <code class="parameter">max</code>.
  </p>
  <p class="para">
   <code class="parameter">min</code> and <code class="parameter">max</code> can both be negative but <code class="parameter">min</code> must always be less than <code class="parameter">max</code>.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.gmp-random-range-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">min</code></dt>

     <dd>

      <p class="para">
       A GMP number representing the lower bound for the random number
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">max</code></dt>

     <dd>

      <p class="para">
       A GMP number representing the upper bound for the random number
      </p>
     </dd>

       
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.gmp-random-range-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   A random GMP number.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.gmp-random-range-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4094">
    <p><strong>Example #1 <span class="function"><strong>gmp_random_range()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$rand1&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">gmp_random_range</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">100</span><span style="color: #007700">);&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">//&nbsp;random&nbsp;number&nbsp;between&nbsp;0&nbsp;and&nbsp;100<br /></span><span style="color: #0000BB">$rand2&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">gmp_random_range</span><span style="color: #007700">(-</span><span style="color: #0000BB">100</span><span style="color: #007700">,&nbsp;-</span><span style="color: #0000BB">10</span><span style="color: #007700">);&nbsp;</span><span style="color: #FF8000">//&nbsp;random&nbsp;number&nbsp;between&nbsp;-100&nbsp;and&nbsp;-10<br /><br /></span><span style="color: #007700">echo&nbsp;</span><span style="color: #0000BB">gmp_strval</span><span style="color: #007700">(</span><span style="color: #0000BB">$rand1</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo&nbsp;</span><span style="color: #0000BB">gmp_strval</span><span style="color: #007700">(</span><span style="color: #0000BB">$rand2</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
42
-67
</pre></div>
    </div>
   </div>
  </p>
 </div>


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